08.6
    87． Our efforts will pay off if the results of this researchcan be applied to the development of the new technology.（能应用于新技术的开发）
    88． I can’t boot my computer now. Something must be wrong(一定出了毛病) with its operation system.
    89. Leaving one’s job,  whatever job it is/ no matter what job it is（不管是什么工作）, is a difficult change even for those who look forward to retiring.
    90. Compared with the place where I grew up（与我成长的地方相比），this town is more prosperous and exciting.
    91. Not until he had finished the mission（直到他完成使命）did he realize that he was seriously ill.

08.12
87. Medical researchers are painfully aware that there are many problems which/that they haven’t found answers to （他们至今还没有答案）.
88. What most parents care about / are concerned about或The concern of most parents （大多数父母所关心的）is providing the best education possible for their children
89. You’d better take a sweater with you in case it turns/should turn cold或lest it should turn cold （以防天气变冷）.
90. Through the project, many people have received training and decided to start their own business （决定自己创业）
91. The anti-virus agent was not known until it was accidentally found/discovered by a doctor （直到一名医生偶然发现了它）.

09.6
87. Soon after he transferred to the new school, Ali found that he had difficulty (in) catching up with his classmates(很难跟上班里的同学)in math and English
88. If she had returned an hour earlier, Mary would not have been caught in the heavy rain（就不会被大雨淋了).
89. It is said that those who are stressed or working overtime are more likely to gain /put on weight(更有可能增加体重).　
90.What is not realized by many people/ what many people have not realized(很多人所没意识到的)is that Simon is a lover of sports, and football in particular.
91.The study shows that the poor functioning of the human body is closely related to the lack of exercise(与缺乏锻炼密切相关).

09.12
87. You would not have failed if_you had followed my instructions（按照我的指令去做）
88. Despite the hardship he encountered, Mark never__gave up pursuing knowlege_（放弃对知识的追求）
89. Scientists agree that it will be a long time before we find the methods of curing cancers（我们找到治愈癌症的方法）
90. Production has to be increased considerably to keep pace with the constantly increasing demands of consumers（与消费者不断增长的需求保持同步）
91. The more exercise you take, the fewer chances you will have of catching a cold.（你越不大可能感冒）